Urticaria (Hives): a complete overview - DermNet
Acute urticaria can occur in newborns and infants but is uncommon. Acute urticaria in children is usually caused by infection, even if afebrile. In older children food, medication, and inhaled allergens are also important causes. In adults urticaria is usually idiopathic and spontaneous. Acute urticaria with fever can be the first sign of COVID ...
Acute urticaria: Causes, Features, and Treatment - DermNet
Psychotherapy is reported to benefit some patients with chronic urticaria. Avoidance of trigger factors. In addition to antihistamines, the cause of urticaria should be eliminated if known (eg drug or food allergy). Avoidance of relevant type 1 (IgE …
Chronic spontaneous urticaria - DermNet
2018年5月15日 · Disease activity in chronic spontaneous urticaria can be assessed with the 7-day Urticaria Activity Score (UAS7), a simple, validated scoring system based on the assessment of key urticaria signs and symptoms — weals and pruritus — that are documented by the patient. The daily weal and pruritus scores are added up for 7 days; the maximum ...
Urticaria and urticaria-like conditions - DermNet
Spontaneous or 'ordinary' urticaria is divided into acute urticaria (lasting a few hours or days or up to six weeks) and chronic urticaria (persisting more than six weeks, and sometimes life-long). Acute urticaria is self-limiting and often related to infection , and less often due to …
Urticaria in children - DermNet
2019年4月4日 · Urticaria is characterised by individual weals resolving or changing within 24 hours. The child should be thoroughly examined to detect possible causes. If a food or drug allergy is suspected, a skin prick test or immunoglobulin E (IgE) tests may occasionally be arranged to investigate further.
Chronic urticaria - DermNet
The natural history of chronic spontaneous urticaria in children and adults is the same, with the chance of remission within three years being 30-50% and after five years 40-70%. Chronic inducible urticaria seems to be more persistent, particularly cold urticaria and solar urticaria.
Cholinergic Urticaria: Causes, Treatment, and Images - DermNet
Cholinergic urticaria is a common chronic inducible urticaria that is characterised by the presence of short-lived transient hives (itchy bumps) due to stimuli that induce sweating. It typically presents with small, raised 1–4 mm wheals which last for 15–30 minutes. It is also sometimes referred to as cholinergic angioedema urticaria or ...
Chronic inducible urticaria - DermNet
2024年9月9日 · What causes chronic inducible urticaria? Urticaria is a mast cell-driven disease.Activated mast cells release histamine along with other mediators, such as platelet-activating factor and cytokines, resulting in sensory nerve activation, vasodilation, plasma extravasation, and recruitment of cells to the urticarial lesion.
Papular urticaria - DermNet
Papular urticaria is usually a clinical diagnosis. A biopsy may support the diagnosis, as insect bites have a characteristic microscopic appearance. The histopathology of papular urticaria includes mild dermal oedema , extravasation of erythrocytes , interstitial eosinophils , and exocytosis of lymphocytes.
Cold urticaria - DermNet
Cold urticaria is a relatively uncommon form of chronic inducible urticaria. Urticarial weals develop after being exposed to cold, cold water, and cold objects. Acquired cold urticaria is now understood to be a completely different disorder from familial cold autoinflammatory syndrome (FCAS), previously known as hereditary cold urticaria.